content: /* Copyright 2011 Adrian Sutton
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package net.symphonious.disrupter.dsl.stubs;
  
  import com.lmax.disruptor.BatchHandler;
  
  import java.util.concurrent.atomic.AtomicBoolean;
  
  public class DelayedBatchHandler implements BatchHandler<StubEntry>
  {
      private AtomicBoolean readyToProcessEvent = new AtomicBoolean(false);
      private volatile boolean stopped = false;
  
      public void onAvailable(final StubEntry entry) throws Exception
      {
          waitForAndSetFlag(false);
      }
  
      public void onEndOfBatch() throws Exception
      {
      }
  
      public void processEvent()
      {
          waitForAndSetFlag(true);
      }
  
      public void stopWaiting()
      {
          stopped = true;
      }
  
      private void waitForAndSetFlag(final boolean newValue)
      {
          while (!stopped && !Thread.interrupted() && !readyToProcessEvent.compareAndSet(!newValue, newValue))
          {
              Thread.yield();
          }
      }
  }
  